Distribution of maintenance procedures

 (1) the maintenance single phase electric motor of landing the ark: take out the drawer cabinet,drawer cabinet of automatic air switch,contactor,tighten all of the terminal,contact uneven parts with a flat file file,not spring gasket must be paid to the replacement,check whether the primary loop line ear asynchronous motor contact,end of the line insulation are in good condition,connection-peg presence of the ablation phenomenon,after the dust cleaning,back into the power distribution cabinet,close the air switch,check whether the control parts and instructions normally.(2) the maintenance of PGL ark: after the blackout,first check whether the automatic switch,isolating switch is good,tighten all wiring,contact has ablation parts with a flat file file.Spring washer should be replaced,check whether the main return route ear is well connected firmly.

Terminal insulation is reliable,check whether the zero line insulation layer is damaged,aging,loose contact,test grounding of cabinet put oneself in another's position,sending after cleaning dust,check www.facebook.com/dongfeng.motor the secondary loop.(3) maintenance procedures for capacitance ark: first will play to stop switch capacitance ark,then disconnect the total power switch capacitance ark,with 25 MMZ wires through the resistance by the capacitor to discharge to check and tighten the contactor,reactor,capacitor terminals,terminal control line are in good condition,the grounding device meets the requirements,contact of permanent magnet motor the file ablation and clean the tank components,then closing check discharge lamp and automatic compensation system is normal.All of the above maintenance as a result,should be written in maintenance records.

The dc grounding method 2

Multipoint earthing: ground wire of each system USES more short wire grounding method, called the multipoint earthing. When a signal or a high frequency of electromagnetic interference or using fast logic, coupling capacitance coupling effect will produce some kind of interference, then lead length become the main contradiction, multipoint earthing must be used to minimize the series impedance, and to minimize the standing wave. Multipoint grounding method is applied to the high frequency circuit (f > 10 MHZ). Before two hundred and thirty, interference is called radio frequency interference, because most of the noise and interference signal from the radio frequency. Today the electronic computer, digital technology and logic circuit constantly expand the application field, the interference is known as the electromagnetic interference (emi) now. Electromagnetic interference including conductive electromagnetic interference, the interference energy sent through a wire or cable from one circuit to another circuit. Reduce the conductive electromagnetic interference is through reasonable design of the circuit, filter acmotor2.blogspot.com and rational grounding circuit is used to realize; 

The radiation electromagnetic interference of the energy is transmitted through the electromagnetic field in air. In the design of casing and casing, by choosing reasonable shielding materials, single phase asynchronous motor construction technology and equipment arrangement and the reasonable grounding technology and so on to reduce the radiation electromagnetic interference. Which deal with grounding engineering is the most important technical measures preventing electromagnetic interference. Most of low frequency interference is coupled to each other through the line, the previously mentioned common impedance coupling. When two circuit electric current flows through the same public impedance of a circuit when the current is 5kw permanent magnet generator formed on the impedance voltage will affect the www.dongfeng-motor.com other circuit, which is common impedance coupling. If a common grounding network in different places respectively connected to the attachment. Due to the common impedance coupling relationship, the attachment will be Vg1 and Vgz voltage between the connection of the ground voltage is not the same. Vg1 and Vgz is interfering voltage, after amplification could directly affect the communication or control signals. Multipoint grounding allow there is a lot of the advantages of the loop, then at the same time, use of low frequency circuit can be harmful, if you have the above situation, can consider to adopt the method of mixed ground.

Variable frequency speed control system

At present, the domestic research in variable frequency speed regulation system is www.dongfeng-motor.com very active, but also is not very ideal in terms of industrialization, most of the market is still dominated by foreign companies. Therefore, in order to speed up the development of variable frequency speed regulation system of our country, the needs of the international development trend of variable frequency speed regulation technology and the domestic market demand have a comprehensive understanding. The energy industry as the foundation of the national economy, for the development of society, economy and the improvement of people's living standard is very important. In the rapid growth of economic environment, China's energy industry faced with dual pressure of economic wholesalemotor.blogspot.com growth and environmental protection. The data show that, under the influence of capital, technology, energy prices, China's energy efficiency is much lower than the developed countries. Energy-intensive products of China in the 90 s energy is generally higher than in developed countries 12% to 55%, more than 90% of the energy in the mining, processing and transformation, in the course of storage and transportation and terminal diesel generators prices loss and waste. 

If the energy consumption per unit GNP (tons of standard coal/thousand dollars) country (mid - 90 - s), China respectively is Switzerland, Italy, Japan, France, Germany, Britain, the United States, Canada, 14.4 times, 11.3 times, 10.6 times, 8.8 times, 8.3 times, 7.2 times, 4.6 times and 4.2 times. In 1995, China's coal-fired power plant coal consumption of 412 grams of standard coal/kWh, 1.27 times that of the international advanced level. Therefore, the effective use of energy in our country is very urgent. As one of the large energy consumption of the motor in the aspect of energy saving is a potential can be dug. Total installed capacity of 400 million kilowatts of electric motor in our country, 600 billion KWH, electricity consumption accounted for about 80% of the industrial electricity consumption. In all kinds of used motor, more than 80% for small and medium asynchronous motor motor lamination under 0.55 220 kw. Overall equipment level in motor system in China is equivalent to the level of developed countries' 50 s. Therefore, 15 plans in the country, the motor system energy saving investment up to 50 billion yuan, so the variable frequency speed regulation system in our country will have a huge market demand. The current global economic development, there are two significant interwoven lines: energy and the environment. Energy of tension is not only restricted the considerable economic growth in developing countries, also brought quite a big problem for many developed countries. Where energy concentration also tend to be the focus of the world's hot spots. And the development and utilization of energy and protecting the environment has a significant impact. Global warming, acid rain, and a series of environmental disasters are related to the development and utilization of energy.

Y series three phase asynchronous motor

Y series three phase asynchronous motor,The series of products on the basis of the original Y series,made many improvements in innovation and improving,make the product more optimized,the performance of the structure more reasonable and reliable,in the design process USES the latest design means,such as 3 d design method,the finite element analysis,and so on,its reliability,rationality,this series of motor design has the characteristics of high starting point,high demand,high reliability,the mechanical structure adopted home after a long time to verify the high reliability of the structure,insulation system also wholesalemotor.blogspot.com USES a high standard,high requirement of system,to ensure the motor can run for a long time and not easy ageing,insulation motor service life is greatly increased,the performance parameters are more than the national standard of the corresponding requirements.Y series high-voltage three-phase asynchronous motor technical conditions,the motor adopts box-type structure,frame adopts steel diesel generators prices plate welding and become,light weight,good rigidity.Top of the motor can be installed protective cap,tear open outfit is convenient,convenient maintenance and repair of the motor.Outside being connected structure is used in the stator end have reliable fixed and binding,acmotortrading.blogspot.com in the process of manufacturing after many interturn voltage test and impact resistance of pressure test,and adopts advanced vacuum pressure impregnation process without solvent paint,motor adopts class F insulation structure,according to the assessment of class B temperature,bearing a rolling bearing and sliding bearing two types,depends on the motor power size and speed,can also according to the requirements of the users.According to the order required to provide other voltage,frequency and degree of protection of motor.This series of medium-sized high-voltage motor has high efficiency and energy saving,low noise,little vibration,reliable operation,easy installation and maintenance,etc.Y series high voltage motor is suitable for driving various kinds of general electric machinery such as fan,compressor,water pump,crusher,cutting machine,transportation machinery and other equipment,in mining,mechanical industry,petroleum chemical industry,power plants and other industries as a prime mover,used to drive a blower,coal mill,rolling mill,hoist induction motor motor should be indicated when ordering purposes and technical requirements,the use of special design to ensure reliable motor running.